i2pd/HTTPServer.cpp

#include <ctime>
#include <iomanip>
#include <sstream>
#include <thread>
#include <memory>

#include <boost/asio.hpp>
#include <boost/bind.hpp>

#include "Base.h"
#include "FS.h"
#include "Log.h"
#include "Tunnel.h"
#include "TransitTunnel.h"
#include "Transports.h"
#include "NetDb.h"
#include "HTTP.h"
#include "LeaseSet.h"
#include "Destination.h"
#include "RouterContext.h"
#include "ClientContext.h"
#include "HTTPServer.h"

// For image and info
#include "version.h"

namespace i2p {
namespace http {
	const char *itoopieImage =
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	const char *cssStyles =
		"<style>\r\n"
		"  body { font: 100%/1.5em sans-serif; margin: 0; padding: 1.5em; background: #FAFAFA; color: #103456; }\r\n"
		"  a { text-decoration: none; color: #894C84; }\r\n"
		"  a:hover { color: #FAFAFA; background: #894C84; }\r\n"
		"  .header { font-size: 2.5em; text-align: center; margin: 1.5em 0; color: #894C84; }\r\n"
		"  .wrapper { margin: 0 auto; padding: 1em; max-width: 60em; }\r\n"
		"  .left  { float: left; position: absolute; }\r\n"
		"  .right { float: left; font-size: 1em; margin-left: 13em; max-width: 46em; overflow: auto; }\r\n"
		"  .tunnel.established { color: #56B734; }\r\n"
		"  .tunnel.expiring    { color: #D3AE3F; }\r\n"
		"  .tunnel.failed      { color: #D33F3F; }\r\n"
		"  .tunnel.another     { color: #434343; }\r\n"
		"  caption { font-size: 1.5em; text-align: center; color: #894C84; }\r\n"
		"  table { width: 100%; border-collapse: collapse; text-align: center; }\r\n"
		"</style>\r\n";

	const char HTTP_PAGE_TUNNELS[] = "tunnels";
	const char HTTP_PAGE_TRANSIT_TUNNELS[] = "transit_tunnels";
	const char HTTP_PAGE_TRANSPORTS[] = "transports";	
	const char HTTP_PAGE_LOCAL_DESTINATIONS[] = "local_destinations";
	const char HTTP_PAGE_LOCAL_DESTINATION[] = "local_destination";
	const char HTTP_PAGE_SAM_SESSIONS[] = "sam_sessions";
	const char HTTP_PAGE_SAM_SESSION[] = "sam_session";
	const char HTTP_PAGE_I2P_TUNNELS[] = "i2p_tunnels";
	const char HTTP_PAGE_JUMPSERVICES[] = "jumpservices";
	const char HTTP_PAGE_COMMANDS[] = "commands";
	const char HTTP_COMMAND_START_ACCEPTING_TUNNELS[] = "start_accepting_tunnels";	
	const char HTTP_COMMAND_STOP_ACCEPTING_TUNNELS[] = "stop_accepting_tunnels";	
	const char HTTP_COMMAND_RUN_PEER_TEST[] = "run_peer_test";	
	const char HTTP_PARAM_BASE32_ADDRESS[] = "b32";
	const char HTTP_PARAM_SAM_SESSION_ID[] = "id";
	const char HTTP_PARAM_ADDRESS[] = "address";

	std::map<std::string, std::string> jumpservices = {
		{ "inr.i2p",    "http://joajgazyztfssty4w2on5oaqksz6tqoxbduy553y34mf4byv6gpq.b32.i2p/search/?q=" },
		{ "stats.i2p",  "http://7tbay5p4kzeekxvyvbf6v7eauazemsnnl2aoyqhg5jzpr5eke7tq.b32.i2p/cgi-bin/jump.cgi?a=" },
	};

	void ShowUptime (std::stringstream& s, int seconds) {
		int num;

		if ((num = seconds / 86400) > 0) {
			s << num << " days, ";
			seconds -= num;
		}
		if ((num = seconds / 3600) > 0) {
			s << num << " hours, ";
			seconds -= num;
		}
		if ((num = seconds / 60) > 0) {
			s << num << " min, ";
			seconds -= num;
		}
		s << seconds << " seconds";
	}

	void ShowStatus (std::stringstream& s)
	{
		s << "<b>Uptime:</b> ";
		ShowUptime(s, i2p::context.GetUptime ());
		s << "<br>\r\n";
		s << "<b>Status:</b> ";
		switch (i2p::context.GetStatus ())
		{
			case eRouterStatusOK: s << "OK"; break;
			case eRouterStatusTesting: s << "Testing"; break;
			case eRouterStatusFirewalled: s << "Firewalled"; break; 
			default: s << "Unknown";
		} 
		s << "<br>\r\n";
		s << "<b>Tunnel creation success rate:</b> " << i2p::tunnel::tunnels.GetTunnelCreationSuccessRate () << "%<br>\r\n";
		s << "<b>Received:</b> ";
		s << std::fixed << std::setprecision(2);
		auto numKBytesReceived = (double) i2p::transport::transports.GetTotalReceivedBytes () / 1024;
		if (numKBytesReceived < 1024)
			s << numKBytesReceived << " KiB";
		else if (numKBytesReceived < 1024 * 1024)
			s << numKBytesReceived / 1024 << " MiB";
		else
			s << numKBytesReceived / 1024 / 1024 << " GiB";
		s << " (" << (double) i2p::transport::transports.GetInBandwidth () / 1024 << " KiB/s)<br>\r\n";
		s << "<b>Sent:</b> ";
		auto numKBytesSent = (double) i2p::transport::transports.GetTotalSentBytes () / 1024;
		if (numKBytesSent < 1024)
			s << numKBytesSent << " KiB";
		else if (numKBytesSent < 1024 * 1024)
			s << numKBytesSent / 1024 << " MiB";
		else
			s << numKBytesSent / 1024 / 1024 << " GiB";
		s << " (" << (double) i2p::transport::transports.GetOutBandwidth () / 1024 << " KiB/s)<br>\r\n";
		s << "<b>Data path:</b> " << i2p::fs::GetDataDir() << "<br>\r\n<br>\r\n";
		s << "<b>Our external address:</b>" << "<br>\r\n" ;
		for (auto address : i2p::context.GetRouterInfo().GetAddresses())
		{
			switch (address->transportStyle)
			{
				case i2p::data::RouterInfo::eTransportNTCP:
					if (address->host.is_v6 ())
						s << "NTCP6&nbsp;&nbsp;";
					else
						s << "NTCP&nbsp;&nbsp;";
				break;
				case i2p::data::RouterInfo::eTransportSSU:
					if (address->host.is_v6 ())
						s << "SSU6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
					else
						s << "SSU&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
				break;
				default:
					s << "Unknown&nbsp;&nbsp;";
			}
			s << address->host.to_string() << ":" << address->port << "<br>\r\n";
		}
		s << "<br>\r\n<b>Routers:</b> " << i2p::data::netdb.GetNumRouters () << " ";
		s << "<b>Floodfills:</b> " << i2p::data::netdb.GetNumFloodfills () << " ";
		s << "<b>LeaseSets:</b> " << i2p::data::netdb.GetNumLeaseSets () << "<br>\r\n";

		size_t clientTunnelCount = i2p::tunnel::tunnels.CountOutboundTunnels();
		clientTunnelCount += i2p::tunnel::tunnels.CountInboundTunnels();
		size_t transitTunnelCount = i2p::tunnel::tunnels.CountTransitTunnels();
		
		s << "<b>Client Tunnels:</b> " << std::to_string(clientTunnelCount) << " ";
		s << "<b>Transit Tunnels:</b> " << std::to_string(transitTunnelCount) << "<br>\r\n";
	}

	void ShowJumpServices (std::stringstream& s, const std::string& address)
	{
		s << "<form type=\"GET\" action=\"/\">";
		s << "<input type=\"hidden\" name=\"page\" value=\"jumpservices\">";
		s << "<input type=\"text\"   name=\"address\" value=\"" << address << "\">";
		s << "<input type=\"submit\" value=\"Update\">";
		s << "</form><br>\r\n";
		s << "<b>Jump services for " << address << "</b>\r\n<ul>\r\n";
		for (auto & js : jumpservices) {
			s << "  <li><a href=\"" << js.second << address << "\">" << js.first << "</a></li>\r\n";
		}
		s << "</ul>\r\n";
	}

	void ShowLocalDestinations (std::stringstream& s)
	{
		s << "<b>Local Destinations:</b><br>\r\n<br>\r\n";
		for (auto& it: i2p::client::context.GetDestinations ())
		{
			auto ident = it.second->GetIdentHash ();; 
			s << "<a href=/?page=" << HTTP_PAGE_LOCAL_DESTINATION << "&b32=" << ident.ToBase32 () << ">"; 
			s << i2p::client::context.GetAddressBook ().ToAddress(ident) << "</a><br>\r\n" << std::endl;
		}
	}

	void  ShowLocalDestination (std::stringstream& s, const std::string& b32)
	{
		s << "<b>Local Destination:</b><br>\r\n<br>\r\n";
		i2p::data::IdentHash ident;
		ident.FromBase32 (b32);
		auto dest = i2p::client::context.FindLocalDestination (ident);
		if (dest)
		{
			s << "<b>Base64:</b><br>\r\n<textarea readonly=\"readonly\" cols=\"64\" rows=\"11\" wrap=\"on\">";
			s << dest->GetIdentity ()->ToBase64 () << "</textarea><br>\r\n<br>\r\n";
			s << "<b>LeaseSets:</b> <i>" << dest->GetNumRemoteLeaseSets () << "</i><br>\r\n";
			auto pool = dest->GetTunnelPool ();
			if (pool)
			{
				s << "<b>Tunnels:</b><br>\r\n";
				for (auto it: pool->GetOutboundTunnels ())
				{
					it->Print (s);
					auto state = it->GetState ();
					if (state == i2p::tunnel::eTunnelStateFailed)
						s << " " << "Failed";
					else if (state == i2p::tunnel::eTunnelStateExpiring)
						s << " " << "Exp";
					s << "<br>\r\n" << std::endl;
				}
				for (auto it: pool->GetInboundTunnels ())
				{
					it->Print (s);
					auto state = it->GetState ();
					if (state == i2p::tunnel::eTunnelStateFailed)
						s << " " << "Failed";
					else if (state == i2p::tunnel::eTunnelStateExpiring)
						s << " " << "Exp";
					s << "<br>\r\n" << std::endl;
				}
			}	
			s << "<b>Tags</b><br>Incoming: " << dest->GetNumIncomingTags () << "<br>Outgoing:<br>" << std::endl;
			for (auto it: dest->GetSessions ())
			{
				s << i2p::client::context.GetAddressBook ().ToAddress(it.first) << " ";
				s << it.second->GetNumOutgoingTags () << "<br>" << std::endl;
			}	
			s << "<br>" << std::endl;
			// s << "<br>\r\n<b>Streams:</b><br>\r\n";
			// for (auto it: dest->GetStreamingDestination ()->GetStreams ())
			// {	
				// s << it.first << "->" << i2p::client::context.GetAddressBook ().ToAddress(it.second->GetRemoteIdentity ()) << " ";
				// s << " [" << it.second->GetNumSentBytes () << ":" << it.second->GetNumReceivedBytes () << "]";
				// s << " [out:" << it.second->GetSendQueueSize () << "][in:" << it.second->GetReceiveQueueSize () << "]";
				// s << "[buf:" << it.second->GetSendBufferSize () << "]";
				// s << "[RTT:" << it.second->GetRTT () << "]";
				// s << "[Window:" << it.second->GetWindowSize () << "]";
				// s << "[Status:" << (int)it.second->GetStatus () << "]"; 
				// s << "<br>\r\n"<< std::endl; 
			// }	
			s << "<br>\r\n<table><caption>Streams</caption><tr>";
			s << "<th>StreamID</th>";
			s << "<th>Destination</th>";
			s << "<th>Sent</th>";
			s << "<th>Received</th>";
			s << "<th>Out</th>";
			s << "<th>In</th>";
			s << "<th>Buf</th>";
			s << "<th>RTT</th>";
			s << "<th>Window</th>";
			s << "<th>Status</th>";
			s << "</tr>";

			for (auto it: dest->GetAllStreams ())
			{	
				s << "<tr>";
				s << "<td>" << it->GetSendStreamID () << "</td>";
				s << "<td>" << i2p::client::context.GetAddressBook ().ToAddress(it->GetRemoteIdentity ()) << "</td>";
				s << "<td>" << it->GetNumSentBytes () << "</td>";
				s << "<td>" << it->GetNumReceivedBytes () << "</td>";
				s << "<td>" << it->GetSendQueueSize () << "</td>";
				s << "<td>" << it->GetReceiveQueueSize () << "</td>";
				s << "<td>" << it->GetSendBufferSize () << "</td>";
				s << "<td>" << it->GetRTT () << "</td>";
				s << "<td>" << it->GetWindowSize () << "</td>";
				s << "<td>" << (int)it->GetStatus () << "</td>";
				s << "</tr><br>\r\n" << std::endl; 
			}
		}	
	}

	void ShowTunnels (std::stringstream& s)
	{
		s << "<b>Tunnels:</b><br>\r\n<br>\r\n";
		s << "<b>Queue size:</b> " << i2p::tunnel::tunnels.GetQueueSize () << "<br>\r\n";
		for (auto it: i2p::tunnel::tunnels.GetOutboundTunnels ())
		{
			it->Print (s);
			auto state = it->GetState ();
			if (state == i2p::tunnel::eTunnelStateFailed)
				s << "<span class=\"tunnel failed\"> " << "Failed</span>";
			else if (state == i2p::tunnel::eTunnelStateExpiring)
				s << "<span class=\"tunnel expiring\"> " << "Expiring</span>";
			s << " " << (int)it->GetNumSentBytes () << "<br>\r\n";
			s << std::endl;
		}

		for (auto it: i2p::tunnel::tunnels.GetInboundTunnels ())
		{
			it->Print (s);
			auto state = it->GetState ();
			if (state == i2p::tunnel::eTunnelStateFailed)
				s << "<span class=\"tunnel failed\"> " << "Failed</span>";
			else if (state == i2p::tunnel::eTunnelStateExpiring)
				s << "<span class=\"tunnel expiring\"> " << "Expiring</span>";
			s << " " << (int)it->GetNumReceivedBytes () << "<br>\r\n";
		}
	}	

	void ShowCommands (std::stringstream& s)
	{
		/* commands */
		s << "<b>Router Commands</b><br>\r\n";
		s << "  <a href=/?cmd=" << HTTP_COMMAND_RUN_PEER_TEST << ">Run peer test</a><br>\r\n";
		if (i2p::context.AcceptsTunnels ())
			s << "  <a href=/?cmd=" << HTTP_COMMAND_STOP_ACCEPTING_TUNNELS << ">Stop accepting tunnels</a><br>\r\n";
		else	
			s << "  <a href=/?cmd=" << HTTP_COMMAND_START_ACCEPTING_TUNNELS << ">Start accepting tunnels</a><br>\r\n";
	}

	void ShowTransitTunnels (std::stringstream& s)
	{
		s << "<b>Transit tunnels:</b><br>\r\n<br>\r\n";
		for (auto it: i2p::tunnel::tunnels.GetTransitTunnels ())
		{
			if (std::dynamic_pointer_cast<i2p::tunnel::TransitTunnelGateway>(it))
				s << it->GetTunnelID () << " ⇒ ";
			else if (std::dynamic_pointer_cast<i2p::tunnel::TransitTunnelEndpoint>(it))
				s << " ⇒ " << it->GetTunnelID ();
			else
				s << " ⇒ " << it->GetTunnelID () << " ⇒ ";
			s << " " << it->GetNumTransmittedBytes () << "<br>\r\n";
		}
	}

	void ShowTransports (std::stringstream& s)
	{
		s << "<b>Transports:</b><br>\r\n<br>\r\n";
		auto ntcpServer = i2p::transport::transports.GetNTCPServer (); 
		if (ntcpServer)
		{	
			s << "<b>NTCP</b><br>\r\n";
			for (auto it: ntcpServer->GetNTCPSessions ())
			{
				if (it.second && it.second->IsEstablished ())
				{
					// incoming connection doesn't have remote RI
					if (it.second->IsOutgoing ()) s << " ⇒ ";
					s << i2p::data::GetIdentHashAbbreviation (it.second->GetRemoteIdentity ()->GetIdentHash ()) <<  ": "
						<< it.second->GetSocket ().remote_endpoint().address ().to_string ();
					if (!it.second->IsOutgoing ()) s << " ⇒ ";
					s << " [" << it.second->GetNumSentBytes () << ":" << it.second->GetNumReceivedBytes () << "]";
					s << "<br>\r\n" << std::endl;
				}
			}
		}	
		auto ssuServer = i2p::transport::transports.GetSSUServer ();
		if (ssuServer)
		{
			s << "<br>\r\n<b>SSU</b><br>\r\n";
			for (auto it: ssuServer->GetSessions ())
			{
				auto endpoint = it.second->GetRemoteEndpoint ();
				if (it.second->IsOutgoing ()) s << " ⇒ ";
				s << endpoint.address ().to_string () << ":" << endpoint.port ();
				if (!it.second->IsOutgoing ()) s << " ⇒ ";
				s << " [" << it.second->GetNumSentBytes () << ":" << it.second->GetNumReceivedBytes () << "]";
				if (it.second->GetRelayTag ())
					s << " [itag:" << it.second->GetRelayTag () << "]";
				s << "<br>\r\n" << std::endl;
			}
			s << "<br>\r\n<b>SSU6</b><br>\r\n";
			for (auto it: ssuServer->GetSessionsV6 ())
			{
				auto endpoint = it.second->GetRemoteEndpoint ();
				if (it.second->IsOutgoing ()) s << " ⇒ ";
				s << endpoint.address ().to_string () << ":" << endpoint.port ();
				if (!it.second->IsOutgoing ()) s << " ⇒ ";
				s << " [" << it.second->GetNumSentBytes () << ":" << it.second->GetNumReceivedBytes () << "]";
				s << "<br>\r\n" << std::endl;
			}
		}
	}
	
	void ShowSAMSessions (std::stringstream& s)
	{
		s << "<b>SAM Sessions:</b><br>\r\n<br>\r\n";
		auto sam = i2p::client::context.GetSAMBridge ();
		if (sam)
		{	
			for (auto& it: sam->GetSessions ())
			{
				s << "<a href=/?page=" << HTTP_PAGE_SAM_SESSION << "&sam_id=" << it.first << ">";
				s << it.first << "</a><br>\r\n" << std::endl;
			}	
		}	
	}	

	void ShowSAMSession (std::stringstream& s, const std::string& id)
	{
		s << "<b>SAM Session:</b><br>\r\n<br>\r\n";
		auto sam = i2p::client::context.GetSAMBridge ();
		if (sam)
		{
			auto session = sam->FindSession (id);
			if (session)
			{
				auto& ident = session->localDestination->GetIdentHash();
				s << "<a href=/?page=" << HTTP_PAGE_LOCAL_DESTINATION << "&b32=" << ident.ToBase32 () << ">"; 
				s << i2p::client::context.GetAddressBook ().ToAddress(ident) << "</a><br>\r\n" << std::endl;
				s << "<b>Streams:</b><br>\r\n";
				for (auto it: session->ListSockets())
				{
					switch (it->GetSocketType ())
					{
						case i2p::client::eSAMSocketTypeSession:
							s << "session";
						break;	
						case i2p::client::eSAMSocketTypeStream:
							s << "stream";
						break;	
						case i2p::client::eSAMSocketTypeAcceptor:
							s << "acceptor";
						break;
						default:
							s << "unknown";
					}
					s << " [" << it->GetSocket ().remote_endpoint() << "]";
					s << "<br>\r\n" << std::endl;
				}	
			}
		}	
	}	

	void ShowI2PTunnels (std::stringstream& s)
	{
		s << "<b>Client Tunnels:</b><br>\r\n<br>\r\n";
		for (auto& it: i2p::client::context.GetClientTunnels ())
		{
			auto& ident = it.second->GetLocalDestination ()->GetIdentHash();
			s << "<a href=/?page=" << HTTP_PAGE_LOCAL_DESTINATION << "&b32=" << ident.ToBase32 () << ">"; 
			s << it.second->GetName () << "</a> ⇐ ";			
			s << i2p::client::context.GetAddressBook ().ToAddress(ident);
			s << "<br>\r\n"<< std::endl;
		}	
		s << "<br>\r\n<b>Server Tunnels:</b><br>\r\n<br>\r\n";
		for (auto& it: i2p::client::context.GetServerTunnels ())
		{
			auto& ident = it.second->GetLocalDestination ()->GetIdentHash();
			s << "<a href=/?page=" << HTTP_PAGE_LOCAL_DESTINATION << "&b32=" << ident.ToBase32 () << ">"; 
			s << it.second->GetName () << "</a> ⇒ ";
			s << i2p::client::context.GetAddressBook ().ToAddress(ident);
			s << ":" << it.second->GetLocalPort ();
			s << "</a><br>\r\n"<< std::endl;
		}	
	}	
	
	void HTTPConnection::Receive ()
	{
		m_Socket->async_read_some (boost::asio::buffer (m_Buffer, HTTP_CONNECTION_BUFFER_SIZE),
			 std::bind(&HTTPConnection::HandleReceive, shared_from_this (),
				 std::placeholders::_1, std::placeholders::_2));
	}

	void HTTPConnection::HandleReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
	{
		if (ecode) {
			if (ecode != boost::asio::error::operation_aborted)
				Terminate (ecode);
			return;
		}
		m_Buffer[bytes_transferred] = '\0';
		m_BufferLen = bytes_transferred;
		RunRequest();
		Receive ();
	}

	void HTTPConnection::RunRequest ()
	{
		HTTPReq request;
		int ret = request.parse(m_Buffer);
		if (ret < 0) {
			m_Buffer[0] = '\0';
			m_BufferLen = 0;
			return; /* error */
		}
		if (ret == 0)
			return; /* need more data */
		HandleRequest (request.uri);
	}

	void HTTPConnection::Terminate (const boost::system::error_code& ecode)
	{
		if (ecode == boost::asio::error::operation_aborted)
			return;
		boost::system::error_code ignored_ec;
		m_Socket->shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
		m_Socket->close ();
	}

	void HTTPConnection::HandleRequest (const std::string &uri)
	{
		std::stringstream s;
		// Html5 head start
		s <<
			"<!DOCTYPE html>\r\n"
			"<html lang=\"en\">\r\n" /* TODO: Add support for locale */
			"  <head>\r\n"
			"  <meta charset=\"UTF-8\">\r\n" /* TODO: Find something to parse html/template system. This is horrible. */
			"  <link rel='shortcut icon' href='" << itoopieFavicon << "'>\r\n"
			"  <title>Purple I2P " VERSION " Webconsole</title>\r\n"
			<< cssStyles <<
			"</head>\r\n";
		s <<
			"<body>\r\n"
			"<div class=header><b>i2pd</b> webconsole</div>\r\n"
			"<div class=wrapper>\r\n"
			"<div class=left>\r\n"
			"  <a href=/>Main page</a><br>\r\n<br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_COMMANDS << ">Router commands</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_LOCAL_DESTINATIONS << ">Local destinations</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_TUNNELS << ">Tunnels</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_TRANSIT_TUNNELS << ">Transit tunnels</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_TRANSPORTS << ">Transports</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_I2P_TUNNELS << ">I2P tunnels</a><br>\r\n"
			"  <a href=/?page=" << HTTP_PAGE_JUMPSERVICES << ">Jump services</a><br>\r\n"
			;
		if (i2p::client::context.GetSAMBridge ())
			s << "  <a href=/?page=" << HTTP_PAGE_SAM_SESSIONS << ">SAM sessions</a><br>\r\n";
		s << "</div>\r\n";
		s << "<div class=right>";
		if (uri.find("page=") != std::string::npos)
			HandlePage (s, uri);
		else if (uri.find("cmd=") != std::string::npos)
			HandleCommand (s, uri);
		else			
			ShowStatus (s);
		s <<
			"</div></div>\r\n"
			"</body>\r\n"
			"</html>\r\n";
		SendReply (s.str ());
	}

	void HTTPConnection::HandlePage (std::stringstream& s, const std::string & uri)
  {
		std::map<std::string, std::string> params;
		std::string page("");
		URL url;

		url.parse(uri);
		url.parse_query(params);
		page = params["page"];

		if (page == HTTP_PAGE_TRANSPORTS)
			ShowTransports (s);
		else if (page == HTTP_PAGE_TUNNELS)
			ShowTunnels (s);
		else if (page == HTTP_PAGE_COMMANDS)
			ShowCommands (s);
		else if (page == HTTP_PAGE_JUMPSERVICES)
			ShowJumpServices (s, params["address"]);
		else if (page == HTTP_PAGE_TRANSIT_TUNNELS)
			ShowTransitTunnels (s);
		else if (page == HTTP_PAGE_LOCAL_DESTINATIONS)
			ShowLocalDestinations (s);	
		else if (page == HTTP_PAGE_LOCAL_DESTINATION)
			ShowLocalDestination (s, params["b32"]);
		else if (page == HTTP_PAGE_SAM_SESSIONS)
			ShowSAMSessions (s);
		else if (page == HTTP_PAGE_SAM_SESSION)
			ShowSAMSession (s, params["sam_id"]);
		else if (page == HTTP_PAGE_I2P_TUNNELS)
			ShowI2PTunnels (s);
		else
			SendError("Unknown page: " + page);
  }

	void HTTPConnection::HandleCommand (std::stringstream& s, const std::string & uri)
	{
		std::map<std::string, std::string> params;
		std::string cmd("");
		URL url;

		url.parse(uri);
		url.parse_query(params);
		cmd = params["cmd"];

		if (cmd == HTTP_COMMAND_RUN_PEER_TEST)
			i2p::transport::transports.PeerTest ();
		else if (cmd == HTTP_COMMAND_START_ACCEPTING_TUNNELS)
			i2p::context.SetAcceptsTunnels (true);
		else if (cmd == HTTP_COMMAND_STOP_ACCEPTING_TUNNELS)
			i2p::context.SetAcceptsTunnels (false);
		else {
			SendError("Unknown command: " + cmd);
			return;
		}
		s << "<b>Command accepted</b><br><br>\r\n";
		s << "<a href=\"/?page=commands\">Back to commands list</a>";
	}	

	void HTTPConnection::SendReply (const std::string& content, int code)
	{
		std::time_t time_now = std::time(nullptr);
		char time_buff[128];
		std::strftime(time_buff, sizeof(time_buff), "%a, %d %b %Y %H:%M:%S GMT", std::gmtime(&time_now));
		HTTPRes reply;
		reply.code = code;
		reply.status = HTTPCodeToStatus(code);
		reply.headers.insert(std::pair<std::string, std::string>("Date", time_buff));
		reply.headers.insert(std::pair<std::string, std::string>("Content-Type", "text/html"));
		reply.headers.insert(std::pair<std::string, std::string>("Content-Length", std::to_string(content.size())));

		std::string res = reply.to_string();
 		std::vector<boost::asio::const_buffer> buffers;

		buffers.push_back(boost::asio::buffer(res));
 		buffers.push_back(boost::asio::buffer(content));

		boost::asio::async_write (*m_Socket, buffers,
			std::bind (&HTTPConnection::Terminate, shared_from_this (), std::placeholders::_1));
	}

	void HTTPConnection::SendError(const std::string& content)
	{
		std::stringstream ss;
		ss << "<html>" << itoopieImage << "<br>\r\n" << content << "</html>";
		SendReply (ss.str(), 504);
	}

	HTTPServer::HTTPServer (const std::string& address, int port):
		m_Thread (nullptr), m_Work (m_Service),
		m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint (boost::asio::ip::address::from_string(address), port))
	{
	}

	HTTPServer::~HTTPServer ()
	{
		Stop ();
	}

	void HTTPServer::Start ()
	{
		m_Thread = std::unique_ptr<std::thread>(new std::thread (std::bind (&HTTPServer::Run, this)));
		m_Acceptor.listen ();
		Accept ();
	}

	void HTTPServer::Stop ()
	{
		m_Acceptor.close();
		m_Service.stop ();
		if (m_Thread) {
			m_Thread->join ();
			m_Thread = nullptr;
		}
	}

	void HTTPServer::Run ()
	{
		m_Service.run ();
	}

	void HTTPServer::Accept ()
	{
		auto newSocket = std::make_shared<boost::asio::ip::tcp::socket> (m_Service);
		m_Acceptor.async_accept (*newSocket, boost::bind (&HTTPServer::HandleAccept, this,
			boost::asio::placeholders::error, newSocket));
	}

	void HTTPServer::HandleAccept(const boost::system::error_code& ecode, 
		std::shared_ptr<boost::asio::ip::tcp::socket> newSocket)
	{
		if (ecode)
			return;
		CreateConnection(newSocket);
		Accept ();
	}

	void HTTPServer::CreateConnection(std::shared_ptr<boost::asio::ip::tcp::socket> newSocket)
	{
		auto conn = std::make_shared<HTTPConnection> (newSocket);
		conn->Receive ();
	}
} // http
} // i2p